I had posted this earlier and am still confused at contrary results by
two utilities ifconfig and ethtools. Can any one explain?
Sudev Barar
[EMAIL PROTECTED]


On Tue, Aug 05, 2003 at 05:53:47PM +0530, Subin Shahul Hameed wrote:
> 
> How will I check whether my network card is operating in 10 Mbps or
> 100Mbps in Linux.

In reply:

> On Wed, 2003-08-06 at 09:07, VaibhaV Sharma wrote:
> man ethtool
> # ethtool eth0
> should work.
> VaibhaV

On Wed, 2003-08-06 at 08:35, Dileep M. Kumar wrote: 
> [EMAIL PROTECTED] fme $ dmesg  | grep eth1
> eth1: RealTek RTL8139 Fast Ethernet at 0xc8079000, 00:c1:26:08:2e:a4,
> IRQ 5
> eth1:  Identified 8139 chip type 'RTL-8139C'
> eth1: Setting 100mbps full-duplex based on auto-negotiated partner
> ability 45e1.
> [EMAIL PROTECTED] fme $

As you can see there were two replies and I tried both. I am baffled by
the outputs as below since one says NIC is connected at full duplex
100mbps the other says HalfDuplex 10mbps:

OUTPUT 1:
# /bin/dmesg | grep eth0
eth0: RealTek RTL8139 Fast Ethernet at 0xf88d4c00, 00:80:48:15:8b:f9,
IRQ 11
eth0:  Identified 8139 chip type 'RTL-8139C'
eth0: Setting 100mbps full-duplex based on auto-negotiated partner
ability 45e1.

OUTPUT 2:
]# /usr/sbin/ethtool eth0
Settings for eth0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
        Supports auto-negotiation: Yes
        Advertised link modes:  Not reported
        Advertised auto-negotiation: No
        Speed: 10Mb/s
        Duplex: Half
        Port: MII
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: off
        Supports Wake-on: pumbg
        Wake-on: d
        Current message level: 0xffffffff (-1)
        Link detected: no

Why should the two utilities report different?? Any one who can tell
which is the correct output?


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